https://www.ericsbinaryworld.com/2005/12/06/civ4-computers-fighting/
I was surprised that, by only raising the level of difficulty by one, the computer opponents in civ4 began to fight each other. In this instance, it was to my advantage because Washington of the Americans attacked Peter of the Russians, who I was planning to attack anyway. I think I will play my fourth game also at this difficulty level or I fear they may annihilate me. I’m not quite ready for that yet.